Tuscaloosa County Sheriff’s Lt. Andy Norris said the vehicle could be a clue in the fire, which occurred Monday night, but investigators had yet to determine whether the blaze was accidental or purposely set.

County detectives and investigators from the state fire marshal’s office were on the scene of the fire, which destroyed a six-bedroom, five-bath brick house that was listed for sale on real-estate websites at $1.5 million.

A crime dog will be used to determine whether something was used as an accelerant to start the fire, Norris said.

“Anytime you have a vacant house go up, particularly one of that value, you have to consider it suspicious,” he said. “Every house in that neighborhood is probably over $1 million.”

A spokesman for the Cowboys declined comment on the fire, and McClain — chosen by the Raiders with the No. 8 overall pick in 2010 — was not immediately available for comment. The player tweeted about the fire, however: “It can’t be real! To (sic) much of my 'history’ in that house for it to be gone ...”

McClain, a 25-year-old native of Decatur, Ala., listed the house as his home address in a court document filed in September accusing his ex-wife of failing to give him adequate visitation time with their 3-year-old daughter.

The house sat on 4 acres of land beside Lake Tuscaloosa about 14 miles north of Tuscaloosa, where McClain played at the University of Alabama. The house had a three-car garage and a boathouse on the shore.

McClain is making an NFL comeback with the Cowboys after legal scrapes that include his conviction in July on charges including resisting arrest.